Rethinking axial patterning in amphibians
نویسندگان
چکیده
منابع مشابه
Axial patterning in hydra.
Morphogen gradients play an important role in pattern formation during early stages of embryonic development in many bilaterians. In an adult hydra, axial patterning processes are constantly active because of the tissue dynamics in the adult. These processes include an organizer region in the head, which continuously produces and transmits two signals that are distributed in gradients down the ...
متن کاملDevelopmental evolution: Axial patterning in insects
The Drosophila bicoid gene is well known for encoding a protein that forms a morphogenetic gradient with a key role in anterior patterning of the fruitfly embryo. Recent results suggest the evolution of bicoid might have involved dramatic changes in function - essentially the invention of a new regulatory protein.
متن کاملHox patterning of the vertebrate axial skeleton.
The axial skeleton in all vertebrates is composed of similar components that extend from anterior to posterior along the body axis: the occipital skull bones and cervical, thoracic, lumbar, sacral, and caudal vertebrae. Despite significant changes in the number and size of these elements during evolution, the basic character of these anatomical elements, as well as the order in which they appea...
متن کاملThe Role of Hox Genes in Axial Patterning in Hydra1
SYNOPSIS. Hox genes in bilaterians specify distinct regions along the anteriorposterior axis. A question of interest is when in metazoan evolution did this class of genes take on this function. Hox genes have been isolated from a number of cnidarian species including hydra. The expression patterns of two of them, Cnox3 and Cnox-2 have been examined in adult hydra. Cnox-3, a labial homologue, pl...
متن کاملThe establishment of axial patterning in the maize leaf.
The maize leaf consists of four distinct tissues along its proximodistal axis: sheath, ligule, auricle and blade. liguleless1 (lg1) functions cell autonomously to specify ligule and auricle, and may propagate a signal that correctly positions the blade-sheath boundary. The dominant Wavy auricle in blade (Wab1) mutation disrupts both the mediolateral and proximodistal axes of the maize leaf. Wab...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Developmental Dynamics
سال: 2002
ISSN: 1058-8388,1097-0177
DOI: 10.1002/dvdy.10182